Scilab function
Last update : September 1996

articul - finds one or more articulation points

### Calling Sequence

  `nart = articul([i],g)`

### Parameters

- `g`: graph list
- `i`: integer
- `nart`: integer row vector

### Description

`articul` finds one or more articulation points (if they exist) of the graph `g`. `nart` is the row vector of numbers of articulation nodes: deleting one of these nodes increases the number of connected components of the graph. `i` is the optional node number from which the algorithm starts. The default is 1. Note that the result depends strongly on this starting node.

### Examples

    ta=[2  1 3 2 2 4 4 5 6 7 8 8 9 10 10 10 10 11 12 13 14 15 16 17 17];
    he=[1 10 2 5 7 3 2 4 5 8 6 9 7  7 11 13 15 12 13 14 11 16 17 14 15];
    g=make_graph('foo',1,17,ta,he);
    g('node_x')=[283 163 63 57 164 164 273 271 339 384 504 513 439 623 631 757 642];
    g('node_y')=[59 133 223 318 227 319 221 324 432 141 209 319 428 443 187 151 301];
    g('node_diam')=[1:(g('node_number'))]+20;
    show_graph(g);
    nart = articul(g)
    show_nodes(nart);